﻿GET_GEVOMechL2_07_01_01_30 - ANIMATION Screen
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FRA limits the differences in diameter between any two wheel sets in a truck to 0.75 inches (19.1 mm).

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However, for steerable trucks, Engineering recommends that wheels should not continue in service if the diameters in the same truck vary by more than 0.5 inches (12.7 mm) or under the same locomotive if they vary more than 1 inch (25.4 mm).

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These measurements are equivalent to 12-1/2 and 25 tapes, respectively.

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<b>Note: </b>Engineering recommends that wheels should not vary more than 0.0188 inches (1/2 tape) on the same axle, 0.0750 inches (2 tapes) in the same truck, and 0.3002 inches (8 tapes) under the same locomotive for optimum locomotive performance.

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<b>Note: </b>If the recommendations listed above are not met, excessive wear on truck components and reduced locomotive performance can result.
